Department of Science 2018 - 2019 Revision Worksheet - 3 Topic: L-1.1 Animal Skeletons Grade 4 ...... Name:.............................................................. Date: ...../....../2018 Animals can be classified into two groups: 1- Invertebrates = animals without backbone. They usually have hard external skeleton to protect their body and give it shape. Some invertebrates have no skeleton at all. 2- Vertebrates = animals with backbone. They usually have bony internal skeleton. (No need to study the groups of invertebrates. This is only to enrich student’s knowledge. Students must only learn about crustaceans, arachnids and insects.) 1- Invertebrates are animals without backbone. Here are some groups of invertebrates: A- Cnidarians- jelly-like animals with tentacles and stinging cells. Identify these cnidarians. Write: jellyfish – sea anemones – corals _____________________ _______________________ _______________________ B- Annelids- body is divided into many segments (rings) joined together, called segmented worms, and they have moist (wet) skin and no legs. Identify these annelids. Write: earthworm – leech _________________________ _______________________
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Department of Science 2018 - 2019 Revision Worksheet - 3 … · 2019-02-11 · C-Arthropods- include crustaceans, arachnids, insects, etc. *Crustaceans- have hard shell, gills, more
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